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WorksheetsBacteria Shapes, Arrangement and Gram Staining
Total questions: 20
Worksheet time: 3hrs 20mins
Which of these is a cocci occurring in pairs?
Streptococci
Diplococci
Streptococci
Staphylococci
Which of the following statement is TRUE regarding Gram positive bacteria?
Cell wall have high lipid content
Lipopolysacharides layer is present
crystal violet stain is retained
Have 2 layers of cytoplasmic membrane.
What does staphylo mean?
In a line
group of 4
groups or clusters
single
What is this bacteria shape?
Coccus
Bacillus
Spirillum
What is this bacteria shape and arrangement?
Streptobaccillus
Streptococcus
Diplococcus
Staphylococcus
What full name for this bacteria shape/conformation?
Streptococcus
Staphylococcus
Streptobacillus
Staphylobacillus
Spirilium
What conformation of bacteria is this?
Strepto-
Staphylo-
What is the shape of this bacteria?
cocci
spirilla
bacillus
Name the bacteria.
diplococci
Streptobacilli
staphylococci
streptococci
Name the bacteria.
staphylobacilli
Streptobacilli
staphylococci
streptococci
Which stain is used as the counterstain in Gram staining to differentiate between Gram-negative and Gram-positive bacteria?
Safranin
Methylene blue
Crystal violet
Carbol fuchsin
What is the significance of Gram staining in microbiology?
To determine the age of bacteria
To identify the shape of bacteria
To differentiate bacteria based on cell wall composition
To measure the size of bacteria
What is the primary purpose of counterstaining in the Gram staining technique?
To enhance the color of gram-positive bacteria
To remove excess stains
To visualize gram-negative bacteria
To provide contrast to the primary stain
What color do Gram-Negative Bacteria appear after staining with safranin?
Purple
Red/Pink
Blue
Green
Which type of bacteria may have a more complex capsule structure?
Gram-Positive Bacteria
Gram-Negative Bacteria
Both Gram-Positive and Gram-Negative Bacteria
Neither Gram-Positive nor Gram-Negative Bacteria
What is the purpose of safranin in the Gram staining process?
Primary stain
Mordant
Decolorizer
Counterstain
What is the action of crystal violet dye in the Gram staining process?
Stains all cells purple
Stains all cells red
Stains all cells green
Stains all cells blue
Which type of bacteria has an outer lipid membrane?
Gram-positive
Gram-negative
Acid-fast
Mycoplasma
Which type of bacteria has a thick peptidoglycan layer?
Gram-negative
Gram-positive
Acid-fast
Spirochetes
Bacterial cells can have one of three shapes. Which of the following is not a common shape of bacterial cell?
Spirilla
Cocci
Bacilli
Cube
